SGIP is per Watt. The PowerWall is only 2kW average power, but 10kWh capacity. You would need 5 PowerWalls at $17,500 to get $14,600 from PG&E, if it is eligible for the full amount. Actually, now that I think about it, you would need to buy the 7kWh unit to be eligible for SGIP.

ravisekhar, the 10kW Powerwall is intended only for backup power. It uses different batteries than the Tesla traction batteries or the 7kW Powerwall, and is not designed to be discharged and recharged daily. If you're planning to be pulling power from the Powerwall daily, you'll need the 7kW or several 7kW in series.

I don't think you can be on net metering with a battery in CA.Battery would need to be separate so that it could not back feed into the grid.Not sure how Powerwall could be used to supplement home power as the solar fades off in the evening.

I don't think you can be on net metering with a battery in CA.Battery would need to be separate so that it could not back feed into the grid.Not sure how Powerwall could be used to supplement home power as the solar fades off in the evening.

This. Back when we first had solar, PGE specifically prohibited batteries with TOU to minimize gaming of the grid (charge batteries at night and sellback during day at peak rates).

I don't think you can be on net metering with a battery in CA.Battery would need to be separate so that it could not back feed into the grid.Not sure how Powerwall could be used to supplement home power as the solar fades off in the evening.

This. Back when we first had solar, PGE specifically prohibited batteries with TOU to minimize gaming of the grid (charge batteries at night and sellback during day at peak rates).

You could still power your loads from battery after the sun went down, but was still in the Peak rate period. That way your household use would not eat up your Peak generated kWh. Then you could either charge the battery from the grid off-peak, or with morning sunshine. The battery cannot actually feed back into the grid, but can minimize your household usage at selective times.

Good read. Still not clear how SDGE/PGE would allow for this grid-tied with batteries. Electricity flows based on draw or feed. If you turn on the batteries during the day it'll feed the system = 'gaming' the grid and one can 'generate' simply by discharging the batteries.

Scenario which PGE/SDGE would probably object:We're already net producers during day and borderline consumers on semi-pk: -add batteries: -charge at night -discharge gradually between 12noon-6pm. -netmetering wouldn't know the difference.

Only way to keep this 'honest' would be a completely secondary circuit to allow batteries to Charge one way; and discharge another route which I don't know if that's even possible---any electricians out there?